Sonoma County officials warn of potential new evacuation orders if winds push Glass fire beyond lines
Days of hard-fought progress and preparation in Sonoma and Napa counties are being tested as fire crews brace for shifting winds that threaten to push the 58,000-acre Glass fire closer to more populated areas. More than 28,000 buildings are at risk.
The transition to red-flag conditions, now predicted to last into Saturday morning, already was kicking up flames around the burn zone Thursday afternoon, putting the Napa County communities of Calistoga, Angwin and Pope Valley at immediate risk. According to Cal Fire on Thursday evening, the fire had claimed 153 homes in Napa County and 67 homes in Sonoma County and damaging another 69 homes.
Beginning around 5 p.m. Thursday, said Cal Fire Division Chief Ben Nicholls, winds were starting to blow stronger in higher elevations in the northern Sonoma County, marking the first of at least two nights of increased winds blowing over a large, uncontained wildfire.
“Our crews remain vigilant on the lines to monitor any hot spots and to quickly knock them down and extinguish them when they’re found close to the line and ensure that any spot fires or slop-overs out of the main fire are kept as small as possible,” Nicholls said. “Those crews will be at a heightened state of alert through the night, through the red flag event, to ensure that fire is held in check and any escape is rapidly engaged and hopefully caught.”
With containment only at 5%, the danger was widespread. Rising winds out of the northwest were expected to increase fire activity throughout the wildfire, raising the possibility of spot fires and putting pressure on southeastern perimeter lines near communities such as Glen Ellen and Kenwood in Sonoma County. Luckily, as of 9:30 p.m. Thursday, a Cal Fire spokesman said he was not aware of any significant flare-ups or changes in wind, though higher winds were still expected overnight.
One area west of Oakville and Highway 29 in Napa Valley already had demonstrated its vulnerability, as flames outflanked backfire operations, Cal Fire Operations Chief Mark Brunton said during a Thursday afternoon news conference at the Sonoma County Fairgrounds.
Containment lines built in Sugarloaf Ridge State Park and tied to Highway 12 along Adobe Canyon Road also may be challenged if winds exert pressure on the southeastern flank, Brunton said. The National Weather Service has forecast gusts up to 35 mph at high elevations across the North Bay during the red-flag event. Such winds would be less intense than those that drove the fire to the outskirts of Santa Rosa on Sunday night and early Monday, but pose a risk.
“With this flow of wind, that is a concern for us,” Brunton said, pointing to ground that firefighters were seeking to guard above Sonoma Valley, much of it intentionally burned Tuesday night to deprive any advancing flames of fuel. “I have about a 50/50% confidence that line is going to hold, so there’s a potential threat to the community of Kenwood and potentially even Glen Ellen.”
The lull in winds over the past few days gave crews time to dig containment lines to block the fire from advancing, but Thursday and Friday nights were expected to bring conditions that continually test the strength of those defensive preparations.
“We would like to have more mop up prior to getting wind-tested,” Nicholls said, “but we’re at where we’re at, so we’re going to make sure that we’re ready for anything with the conditions that we’re in.”
Much of Kenwood and part of Glen Ellen already is under evacuation order, and Sonoma County sheriff’s officials said new orders were ready, if conditions warranted.
“My main message to you is that more evacuation orders are possible,” Sheriff Mark Essick said during the afternoon briefing.
Cal Fire Incident Commander Billy See said there would be time enough to alert Sonoma Valley residents in the event they might be affected by new fire activity in the coming hours and days.
“There will be plenty of warning,” he said in an interview.
He conceded during the briefing that the growing aggression of fire fronts in the steep and rugged Palisades area near the Napa-Lake County line, outside of Calistoga and and near Angwin were alarming.
After sunset, firefighters were set up along Highway 29 near Old Lawley Toll Road north of Calistoga where the Glass fire was threatening homes. Just south of there, firefighters lit a backfire at dozer line east of the highway, burning vegetation to limit the fire’s progress there.
“Obviously, the red-flag warnings with the high winds predicted are a huge concern for the management team and the Glass incident itself,” See said. “Multiple communities within Sonoma and Napa counties have been affected.”
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